Watch: snooze finished threads, name the files a file approval would edit, Settle on finished notifications, an instant launch from the saved feed, plain Loading states, and no more cancelled errors

Gateway: an approval push for a file change says which files it would edit

gateway/src/notify.ts

@@ -4,7 +4,7 @@
 // a host loads its first snapshot, so a restart never replays old news.
 
 import { threadPhase, type Phase } from "./awareness.ts";
-import type { PushCategory, PushPayload } from "./contract.ts";
+import type { PendingRequest, PushCategory, PushPayload } from "./contract.ts";
 import type { HostRow } from "./db.ts";
 import type { T3Host, ThreadChange } from "./t3/host.ts";
 import { trimText, type SummaryCache, type ThreadSummary } from "./views.ts";
@@ -139,12 +139,32 @@ function category(phase: Phase): PushCategory {
   }
 }
 
+/**
+ * An approval push's body: the files a file-change approval would edit, as "Wants to edit
+ * compose.yml +9 −6" or "Wants to edit 3 files: a.ts, b.ts, c.ts", or else the command it wants to
+ * run. The watch's cards word it the same way.
+ */
+export function approvalBody(request: PendingRequest | null): string {
+  const files = request?.kind === "file-change" ? request.files : [];
+  const [file] = files;
+  if (files.length === 1 && file) {
+    const counts = [
+      file.additions === null ? null : `+${file.additions}`,
+      file.deletions === null ? null : `\u2212${file.deletions}`,
+    ].filter((count) => count !== null);
+    return trimText(["Wants to edit", file.name, ...counts].join(" "), BODY_CHARS);
+  }
+  if (files.length > 1) {
+    return trimText(`Wants to edit ${files.length} files: ${files.map((file) => file.name).join(", ")}`, BODY_CHARS);
+  }
+  const prompt = request?.prompt;
+  return prompt ? `Wants to run: ${trimText(prompt, BODY_CHARS)}` : "Needs your approval.";
+}
+
 function body(phase: Phase, lastError: string | null, summary: ThreadSummary | undefined): string {
   switch (phase) {
-    case "waiting_for_approval": {
-      const prompt = summary?.request?.prompt;
-      return prompt ? `Wants to run: ${trimText(prompt, BODY_CHARS)}` : "Needs your approval.";
-    }
+    case "waiting_for_approval":
+      return approvalBody(summary?.request ?? null);
     case "waiting_for_input": {
       const question = summary?.request?.questions[0]?.question;
       return question ? trimText(question, BODY_CHARS) : "Has a question for you.";